Francis gricb



. F. GRIGB. I MODE OI SUPPORTING THE BILGE KEEL 0F VESSBLS.

No. 6,120. Patented Feb. 20, 1849.

Tm: norms Pzrsns co.. PHOTO-L|THq.. WASHINGTON. n1 c,

UNITED STATES PATENT @FFTQE.

FRANCIS GRICE, OF WASHINGTON, DISTRICT OF COLUMBIA.

BLOCK FOR SUPPORTING- IBILG-ES AND KEELS OF VESSELS.

Specification of Letters Patent No. 6,120, dated February 20, 1849.

To all whom, it may concern Be it known that I, FRANois Grams, of the" city of \Vashington, District of Columbia, have invented a new and Improved Mode of Supporting the Keel and Bilge of Ships or Vessels when Docked; and I do hereby declare that the following is a full and exact description.

A and B 'are two legs 4r feet l inches in length, 9 inches in breadth and 16 inches in thickness, hinged at their head to the block C, D by a pin P and a plate 0 leaving when perpendicular a space of 5 inches between them. The dimensions of the block are 3 feet in length, 16 inches in thickness and 9 inches in breadth. At a distance of one foot 2 inches from the docks bottom there will be a shaft S placed athwart the blocks direction, supported by two rails R, R and projecting on one side so as to receive a drum D two feet in diameter, 4: inches in breadth and grooved, around which will be a chain fastened by one end in the groove, and passing at the other end through a ring N, hence reaching the top of the dock. At a point on the shaft, being the middle distance be tween the two legs, there will be two eye bolts X, X'opposite each other at the end of two diameters of the shaft. A rope or chain is fastened to each of these eye bolts, one going to the leg A, and the other to the leg B. By this arrangement the chain around the drum being pulled, will cause the shaft to revolve and the chains C and C, coiling on said shaft in opposite directions, will draw the legs toward each other, and raise the block O, D. The rails R It will prevent all deviation of the apparatus, and the pin T projecting from each leg and fitting unde1 he rails will counteract all tendency to rise which may be the case when immersed i1 water. A quadrangular clamp K, formed 0: metal 1-}- inches square will clasp the tw legs, and falling by its own gravity as th legs draw near each other will prevent thei separating again. The action of this clam is'rnoreover secured by ratchets and pawl g g and s s placed as per diagram B and E and another ratchet L fitted to the bottom 0 the dock and passing through-the legs, a shown in the same diagram, will by mean of pawls attached to the legs prevent ther from separating, acting as they do, in cor nection with the clamp ratchets above de scribed.

What I claim as my invention and desil to secure by Letters Patent is- The combination of the two legs and th horizontal table supported by them, with tli pawls at their feet, and the rectangula frame and its pawls and ratchet, the who: to be acted upon by devices for giving a COlI cident motion of the legs toward each othc and constituting a support for the bilge; heels of vessels when taken in dock, not i1 tending to limit myself to the precise for. and number of the parts or to the exact six as described as it is obvious that four leg may be used instead of two or that the nun ber of pawls and ratchets may be multiplie FRANCIS GRIQE, Witnesses: r 'ED. CHAPMAN,

Frans. E. Giucn, 

